I think any immortality would have to be genetically induced, so that all cells can continuously regenerate.

That said I feel life itself has been degenerating while evolving in technological areas.
The first life forms on this planet were less material and more energetic, and thought was the creative force instead of actions as it is today.
At least according to some, which for some reason I agree with.

Maybe in order to become colonisers of the universe we must again regenerate and be able to become pure thought, which would enable the covering of the vast distances throughout our universe.
Just a thought.